Finding acceleration using velocity

[Crusaderking1]

Homework Statement

A race car starts from rest and travels east along a straight and level track. For the first 5.0 s of the car's motion, the eastward component of the car's velocity is given by v_x(t)=(0.940 m/s³)t²

Homework Equations

I think I am suppose to use the equation x-x₀=(v₀+v)/2)t

The Attempt at a Solution

I know the givens are x₀=0 and t=5.00s, but I don't know how to use v_x to solve for acceleration. Thanks.

You guys didn't happen to obtain7.46 m/s^2 as the answer, did you?

 

[ehild]

the car's velocity is given by v_x(t)=(0.940 m/s³)t²I think I am suppose to use the equation x-x₀=(v₀+v)/2)t

No, that relation is valid between displacement and velocity for a special kind of motion, what is it? Is it the same as the motion in the problem?

Do you need to get the displacement or the acceleration?


Hint: how is velocity and displacement related in general? How is acceleration defined?

ehild

 

[Crusaderking1]

No, that relation is valid between displacement and velocity for a special kind of motion, what is it? Is it the same as the motion in the problem?

Do you need to get the displacement or the acceleration?


Hint: how is velocity and displacement related in general? How is acceleration defined?

ehild

ok thanks! I just figured it out. =)

the answer is 7.46 m/s^2.